diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0022-clk-bcm2835-Mark-used-PLLs-and-dividers-CRITICAL.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0022-clk-bcm2835-Mark-used-PLLs-and-dividers-CRITICAL.patch | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0022-clk-bcm2835-Mark-used-PLLs-and-dividers-CRITICAL.patch b/target/linux/bcm27xx/patches-4.19/950-0022-clk-bcm2835-Mark-used-PLLs-and-dividers-CRITICAL.patch new file mode 100644 index 0000000000..e4a1d7f660 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0022-clk-bcm2835-Mark-used-PLLs-and-dividers-CRITICAL.patch @@ -0,0 +1,28 @@ +From f1f199b682e258674137105f49d033cb81612ab7 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Mon, 13 Feb 2017 17:20:08 +0000 +Subject: [PATCH] clk-bcm2835: Mark used PLLs and dividers CRITICAL + +The VPU configures and relies on several PLLs and dividers. Mark all +enabled dividers and their PLLs as CRITICAL to prevent the kernel from +switching them off. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/clk/bcm/clk-bcm2835.c | 5 +++++ + 1 file changed, 5 insertions(+) + +--- a/drivers/clk/bcm/clk-bcm2835.c ++++ b/drivers/clk/bcm/clk-bcm2835.c +@@ -1362,6 +1362,11 @@ bcm2835_register_pll_divider(struct bcm2 + divider->div.hw.init = &init; + divider->div.table = NULL; + ++ if (!(cprman_read(cprman, data->cm_reg) & data->hold_mask)) { ++ init.flags |= CLK_IS_CRITICAL; ++ divider->div.flags |= CLK_IS_CRITICAL; ++ } ++ + divider->cprman = cprman; + divider->data = data; + |